Ah! thanks.

That clinches it then. One more agent for the ban list.

Apropos, I think that plenty of bad guys are masquerading as twiceler as well.

Mozilla/5.0 (Twiceler-0.9 http://www.cuil.com/twiceler/robot.html

When 'CUIL' first came out their crawler was all over my servers, sometimes to the point of making them inaccessible for users, I remember having a devil of a time getting rid of them because they came from lots of different IP blocks.

Apparently their bot is called twiceler, maybe they should name it 'CuilBot' or something to that effect.